Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee731f695234712…

MALICIOUS

PDF

82.5 KB Created: 2021-03-26 03:34:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c649b92f27f9fcfe56ec14757c1506f8 SHA-1: 27e13798e5e81a497deba84d4291d2830411b5bd SHA-256: dee731f695234712f36974b99e7b0a74abb5b84165905dc05b3af5971a838b69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. This suggests the document's primary purpose is to redirect users to numerous external websites, likely for distributing malware or phishing. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kuzutuzo.ru/aws?utm_term=simplicity+broadmoor+transmission+problems
    • http://musofiron.ru/kosamusuv1t7b.pdf
    • http://lowusonuraku.mygamesonline.org/vakilefuwegokuxanes.pdf
    • http://groby-ritual.online/reading_body_language_books065f6.pdf
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/1403100.pdf
    • https://fasiwuwazaxeba.weebly.com/uploads/1/3/1/4/131438460/sexobobix-zogoroke-sifatisozupulu.pdf
    • http://help-lnstagram-verifycopyrgiht.com/southern_keto_cookbook_barnes_and_noblekidwi.pdf
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/3265046.pdf
    • https://pasadaxadug.weebly.com/uploads/1/3/5/3/135390708/7fb206a849f333.pdf
    • http://detonic-romania.website/carrot_fantasy_extreme_266fjrh.pdf
    • http://itverys.space/bovujaxadradja.pdf
    • http://suzofovolavuk.scienceontheweb.net/26937356180.pdf
    • http://lajodibibodi.getenjoyment.net/absorption_and_variable_costing.pdf
    • https://fepexugoroba.weebly.com/uploads/1/3/4/4/134469665/womaxam-sozop-vadedatixage-robeminajugexu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pubopebiwofaz.epizy.com/72987148888.pdf
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_0fd48d51255b4d4491ca7ad07698a0e5.pdf?index=true
    • http://fuzinokozekinuk.rf.gd/what_does_the_phrase_auld_lang_syne_mean_brainly.pdf
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_a2530278bbe0479c88a5a6308c16812e.pdf?index=true
    • http://jujageritoxo.atwebpages.com/selitonunetipanut.pdf
    • http://zixadadafupeg.epizy.com/podadora_manual_surtek.pdf
    • http://totegipokazize.epizy.com/tesla_poker_218w_box_mod.pdf
    • https://6fc76513-a17a-4053-940d-bef108f5ea85.filesusr.com/ugd/3a5ef0_10bfb0b67d424a8989b883b2ce48d7b3.pdf?index=true
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_0fd8b46644014311b8f4e2fdf537f705.pdf?index=true
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_41bde6d7a9ce440fada89e4709343cd1.pdf?index=true
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_2f54dc44bac6421b88cbe4ab58f79b26.pdf?index=true
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_a4e2767e378943609ee9b7a780925a9b.pdf?index=true
    • http://nixikivike.epizy.com/90872894750.pdf
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_e6e234550e494ea7a66df935e0e5d5f7.pdf?index=true
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_951f0bcd49144affb971324b88610325.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103bf.bin
ed87fa2b0c72c60a194bf6781fba4784caba05d91750b9c65c32736d9853bd67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 5564 bytes
font_01_sfnt_off0001168d.bin
4198a9a80cc459754e5d126787e3b8884e7b84da6052b46be33c46711c02a992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1168D 11112 bytes

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